I have a SS Tikka Lite in 243.It is the only rifle I have never had to do anything too.Out of the box,with the Tikka rings and Burris 3 x 9 x 40 it has shot five different types of ammo less that 1" three shot groups.I also had to order my Tikka as I am left-handed.Last year made a shot on a decent buck at 475 yards(lasered) and he went about 25 yards after the shot.I will agree with everyone else and say see how it shoots first and I think you will be OK with the Tikka out of the box.